CN110744447B - non-Newtonian fluid phase change clamp applied to grinding - Google Patents
non-Newtonian fluid phase change clamp applied to grinding Download PDFInfo
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- CN110744447B CN110744447B CN201911058243.XA CN201911058243A CN110744447B CN 110744447 B CN110744447 B CN 110744447B CN 201911058243 A CN201911058243 A CN 201911058243A CN 110744447 B CN110744447 B CN 110744447B
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- reversing valve
- air
- workpiece
- cam
- valve body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention discloses a non-Newtonian fluid phase change clamp applied to grinding, which comprises a bottom plate, two four-way joint seats, a workpiece tray, a cam reversing valve, an air bag and a liquid bag, wherein two ends of the bottom of the workpiece tray are respectively and correspondingly fixed on the two four-way joint seats; through the structure, the clamping of the magnetic workpiece can be realized, the clamping of the non-magnetic workpiece can also be realized, the applicability is strong, and the clamping is pasted along the surface of the workpiece by utilizing the air bag and the liquid bag, so that the special-shaped workpiece clamping device can adapt to various special-shaped workpieces.
Description
Technical Field
The invention relates to the technical field of clamps, in particular to a non-Newtonian fluid phase change clamp applied to grinding.
Background
In the processing of the existing grinding machine, an electromagnetic chuck is often used for clamping workpieces, but the electromagnetic chuck has the defects of incapability of clamping non-magnetic workpieces, poor effect of clamping special-shaped workpieces and long time consumption.
Therefore, a clamp which can clamp both magnetic workpieces and non-magnetic workpieces is urgently needed to be provided, and the clamp is suitable for quickly clamping special-shaped workpieces.
Disclosure of Invention
The invention aims to overcome the defects and provide a non-Newtonian fluid phase change clamp applied to grinding.
In order to achieve the purpose, the invention adopts the following specific scheme:
a non-Newtonian fluid phase change clamp applied to grinding comprises a bottom plate, two four-way joint seats respectively fixed at two ends of the bottom plate, a workpiece tray, a cam reversing valve, an air bag and a liquid bag storing non-Newtonian fluid, the two ends of the bottom of the workpiece tray are respectively and correspondingly fixed on the two four-way joint seats, the cam reversing valve is fixed in the middle of the bottom of the workpiece tray, the cam reversing valve is provided with two air inlets and an air outlet, the two air inlets of the cam reversing valve are respectively communicated with one joint of the two four-way joint seats through air pipes correspondingly, the air outlet of the cam reversing valve is communicated with an external vacuum generator, the air bag is arranged on the workpiece tray, the liquid bag is arranged in the air bag, a closed space is formed between the air bag and the liquid bag, and the two four-way joint seats are respectively communicated with the closed space through the other three joints.
In the invention, an annular baffle plate flange is fixed on the periphery of the workpiece tray.
The cam reversing valve comprises a reversing driving motor, a reversing valve body and an eccentric cam, wherein the reversing valve body is fixed on a workpiece tray, a groove is formed in one side face of the reversing valve body, the eccentric cam is arranged in the groove, the reversing driving motor is fixed on the other side face, opposite to the reversing valve body, of the reversing valve body, the output end of the reversing driving motor movably penetrates through the reversing valve body and is in transmission connection with the eccentric cam, two air channel passages are formed in the reversing valve body and correspond to two air inlets, one ends of the two air channel passages are communicated with each other and then are connected with an air outlet, the other ends of the two air channel passages are respectively provided with a valve core, one end of each valve core is connected with a return spring, the other end of each return spring abuts against the reversing valve body, and the other ends of the.
The invention has the beneficial effects that: through the structural arrangement, the clamping of a magnetic workpiece and the clamping of a non-magnetic workpiece can be realized, the applicability is strong, and the clamping is adhered along the surface of the workpiece by utilizing the air bag and the liquid bag, so that the special-shaped workpiece clamping device can adapt to various special-shaped workpieces;
in addition, because the workpiece is mainly stressed by radial force in the grinding process, the air bag and the liquid bag are adopted to clamp and position the workpiece in a coating mode, the radial stress on the workpiece can be well offset, and the workpiece is not easy to deform in the machining process.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an enlarged partial schematic view at I of FIG. 2;
FIG. 4 is a schematic view of the four-way joint socket of the present invention;
FIG. 5 is a schematic view of the construction of the cam reversing valve of the present invention;
FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;
FIG. 7 is a schematic view of the construction of the diverter valve body of the present invention;
description of reference numerals: 1-a bottom plate; 2-four-way joint seat; 3-a workpiece pallet; 4-a cam reversing valve; 41-commutating the drive motor; 42-a diverter valve body; 421-an air inlet; 422-air outlet; 423-grooves; 424-gas path channel; 43-an eccentric cam; 44-a valve core; 45-a return spring; 5-air bag; 6-liquid sac; 7-a closed space; 8-trachea; 9-baffle flange.
Detailed Description
The invention will be described in further detail with reference to the following figures and specific examples, without limiting the scope of the invention.
Non-newtonian fluids are a generic term for a class of fluids in which shear stress and shear strain rate are non-linear, and when subjected to an applied shear stress, the viscosity increases dramatically, a phase transition occurs, and the transition from a liquid state to a solid state occurs. Therefore, the clamp applied to grinding machining is designed by combining the phase change characteristic of the non-Newtonian fluid.
As shown in fig. 1 to 7, the non-newtonian fluid phase change clamp applied to grinding in this embodiment includes a base plate 1, two four-way joint seats 2 respectively fixed at two ends of the base plate 1, a workpiece tray 3, a cam reversing valve 4, an air bag 5, and a liquid bag 6 storing non-newtonian fluid, two ends of the bottom of the workpiece tray 3 are respectively and correspondingly fixed on the two four-way joint seats 2, the cam reversing valve 4 is fixed at the middle of the bottom of the workpiece tray 3, the cam reversing valve 4 is provided with two air inlets 421 and an air outlet 422, the two air inlets 421 of the cam reversing valve 4 are respectively and correspondingly communicated with one of the joints of the two four-way joint seats 2 through an air pipe 8, the air outlet 422 of the cam reversing valve 4 is communicated with an external vacuum generator, the air bag 5 is arranged on the workpiece tray 3, and the liquid bag 6 is arranged in the air bag 5, an enclosed space 7 is formed between the air bag 5 and the liquid bag 6, as shown in fig. 3, the four-way joint seats 2 are respectively communicated with the enclosed space 7 through the other three joints, and the air bag 5 and the liquid bag 6 are both made of flexible materials.
According to the non-Newtonian fluid phase change clamp applied to grinding, as shown in FIG. 1, an annular baffle flange 9 is fixed on the periphery of the workpiece tray 3, so that the air bag 5 is limited on the workpiece tray 3, the air bag 5 is effectively prevented from overflowing the workpiece tray 3, and the structure is more reasonable.
The non-newtonian fluid phase transition clamp applied to grinding machining in the embodiment is shown in fig. 5 to 7, the cam reversing valve 4 includes a reversing drive motor 41, a reversing valve body 42 and an eccentric cam 43, the reversing valve body 42 is fixed on the workpiece tray 3, a side face of the reversing valve body 42 is provided with a groove 423, the eccentric cam 43 is arranged in the groove 423, the reversing drive motor 41 is fixed on the other side face opposite to the reversing valve body 42, an output end of the reversing drive motor 41 movably penetrates through the reversing valve body 42 and then is in transmission connection with the eccentric cam 43, two air passage channels 424 are arranged in the reversing valve body 42 corresponding to two air inlets 421, one ends of the two air passage channels 424 are communicated with each other and then are connected with an air outlet 422, the other ends of the two air passage channels 424 are respectively provided with a valve core 44, one end of the valve core 44 is connected, the other end of the return spring 45 abuts against the reversing valve body 42, and the other ends of the two valve cores 44 abut against the eccentric cam 43 under the action of the return spring 45 respectively; when the device is used, the reversing driving motor 41 drives the eccentric cam 43 to rotate, the eccentric cam 43 alternately presses against the valve cores 44 on the left side and the right side, so that the valve cores 44 alternately and correspondingly block the air passage channel 424, namely, the two air inlets 421 are alternately communicated with the air outlet 422 through the air passage channel 424, and the two air inlets 421 are correspondingly communicated with the two four-way joint seats 2, so that the two four-way joint seats 2 are alternately communicated with the air outlet 422, and the two four-way joint seats 2 are distributed on the left side and the right side of the air bag 5.
The specific operation principle of the embodiment is as follows: firstly, a workpiece is placed on the surface of an air bag 5, the workpiece sinks under the action of gravity until a workpiece tray 3 supports the workpiece, at the moment, non-Newtonian fluid in a liquid bag 6 coats the immersed part of the workpiece, the position and the state of the workpiece are determined, then an external vacuum generator is opened, the external vacuum generator enables air in a closed space 7 to enter a four-way joint seat 2, enter a cam reversing valve 4 from the four-way joint seat 2 and an air pipe 8 and then be exhausted from an air outlet 422 of the cam reversing valve 4, so that the closed air is in a vacuum state, then the air bag 5 contracts under the action of atmospheric pressure, and meanwhile extrudes the liquid bag 6, so that the viscosity of the non-Newtonian fluid in the liquid bag 6 is sharply increased under the action of external shearing stress, the non-Newtonian fluid is converted from a liquid state into a solid state, the workpiece is coated and positioned, and the cam reversing valve 4 works after the coating and positioning, the two air inlets 421 are alternately communicated with the air outlets 422, so that the pumping direction of the air path can be periodically changed, namely, the left end and the right end of the closed space 7 are alternately communicated with the air outlets 422 to generate a periodically pulsating extrusion force to act on the liquid bag 6, so that the non-Newtonian fluid is kept in a solid state to provide a continuous clamping force, the clamping of a workpiece is completed, and then the workpiece is ground by using a grinding machine;
after the workpiece is ground, the workpiece needs to be released, the external vacuum generator is disconnected, the cam reversing valve 4 stops working, pressure in the air bag 5 is recovered, the liquid bag 6 is extruded and disappears, the non-Newtonian fluid loses shear stress, and the non-Newtonian fluid is converted from a solid state to a liquid state, so that the workpiece is released.
Through the structural arrangement, the clamping of a magnetic workpiece and the clamping of a non-magnetic workpiece can be realized, the applicability is strong, and the air bag 5 and the liquid bag 6 are attached along the surface of the workpiece, so that the special-shaped workpiece can be quickly clamped;
in addition, because the workpiece is mainly stressed by radial force in the grinding process, the air bag 5 and the liquid bag 6 are adopted to clamp and position the workpiece in a coating mode, the radial stress on the workpiece can be well offset, and the workpiece is not easy to deform in the machining process.
The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present patent application are included in the protection scope of the present patent application.
Claims (1)
1. The non-Newtonian fluid phase change clamp applied to grinding is characterized by comprising a bottom plate (1), two four-way joint seats (2) respectively fixed at two ends of the bottom plate (1), a workpiece tray (3), a cam reversing valve (4), an air bag (5) and a liquid bag (6) storing non-Newtonian fluid, wherein two ends of the bottom of the workpiece tray (3) are respectively and correspondingly fixed on the two four-way joint seats (2), the cam reversing valve (4) is fixed in the middle of the bottom of the workpiece tray (3), the cam reversing valve (4) is provided with two air inlets (421) and an air outlet (422), the two air inlets (421) of the cam reversing valve (4) are respectively and correspondingly communicated with a joint of the two four-way joint seats (2) through an air pipe (8), and the air outlet (422) of the cam reversing valve (4) is communicated with an external vacuum generator, the air bag (5) is arranged on the workpiece tray (3), the liquid bag (6) is arranged in the air bag (5), a closed space (7) is formed between the air bag (5) and the liquid bag (6), and the two four-way joint seats (2) are respectively communicated with the closed space (7) through the other three joints; an annular baffle plate flange (9) is fixed on the periphery of the workpiece tray (3); the cam reversing valve (4) comprises a reversing drive motor (41), a reversing valve body (42) and an eccentric cam (43), the reversing valve body (42) is fixed on the workpiece tray (3), a groove (423) is formed in one side face of the reversing valve body (42), the eccentric cam (43) is arranged in the groove (423), the reversing drive motor (41) is fixed on the other side face, opposite to the reversing valve body (42), of the reversing drive motor (41), the output end of the reversing drive motor (41) movably penetrates through the reversing valve body (42) and then is in transmission connection with the eccentric cam (43), two air channel (424) are arranged in the reversing valve body (42) corresponding to two air inlets (421), one ends of the two air channel (424) are communicated with each other and then are connected with an air outlet (422), the other ends of the two air channel (424) are respectively provided with a valve core (44), one end of the valve core (44) is connected with a, the other end of the return spring (45) is abutted against the reversing valve body (42), and the other ends of the two valve cores (44) are respectively abutted against the eccentric cam (43) under the action of the return spring (45).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911058243.XA CN110744447B (en) | 2019-11-01 | 2019-11-01 | non-Newtonian fluid phase change clamp applied to grinding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911058243.XA CN110744447B (en) | 2019-11-01 | 2019-11-01 | non-Newtonian fluid phase change clamp applied to grinding |
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| CN110744447A CN110744447A (en) | 2020-02-04 |
| CN110744447B true CN110744447B (en) | 2021-06-29 |
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| CN201911058243.XA Active CN110744447B (en) | 2019-11-01 | 2019-11-01 | non-Newtonian fluid phase change clamp applied to grinding |
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| CN114102241A (en) * | 2021-12-07 | 2022-03-01 | 张洁泓 | Hard alloy tool bit |
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| EP1283760A1 (en) * | 2000-05-15 | 2003-02-19 | Centre d'Ingénierie de Recherche et de Transfert de l' Esstin | Vise structure for positioning and maintaining parts to be machined |
| CN1799784A (en) * | 2004-12-31 | 2006-07-12 | 中国科学技术大学 | Clamping holder with rigidity changeable flexible surface |
| CN103100907A (en) * | 2013-01-28 | 2013-05-15 | 北京航空航天大学 | Freezing fixation flexible clamp used for numerical control cutting machining of thin-walled part |
| CN106002360A (en) * | 2016-05-30 | 2016-10-12 | 成都飞机工业（集团）有限责任公司 | Thin-wall porous structure sheet material milling and clamping method and thin-wall porous structure sheet material clamping device |
| CN206653159U (en) * | 2017-02-24 | 2017-11-21 | 浙江万里扬股份有限公司 | Fixture and processing assembly |
| CN108788847A (en) * | 2018-06-26 | 2018-11-13 | 上海理工大学 | A kind of magnetorheological fixture of processing thin-wall curved-surface workpiece |
| CN110125707A (en) * | 2019-05-14 | 2019-08-16 | 上海理工大学 | Magnetorheological grip device for the processing of thin-walled concave curved surface part |
| CN211277966U (en) * | 2019-11-01 | 2020-08-18 | 徐州鑫环密封科技有限公司 | non-Newtonian fluid phase change clamp applied to grinding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6224428B2 (en) * | 2013-11-19 | 2017-11-01 | 東京エレクトロン株式会社 | Method of attracting the focus ring to the mounting table |
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2019
- 2019-11-01 CN CN201911058243.XA patent/CN110744447B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1283760A1 (en) * | 2000-05-15 | 2003-02-19 | Centre d'Ingénierie de Recherche et de Transfert de l' Esstin | Vise structure for positioning and maintaining parts to be machined |
| CN1799784A (en) * | 2004-12-31 | 2006-07-12 | 中国科学技术大学 | Clamping holder with rigidity changeable flexible surface |
| CN103100907A (en) * | 2013-01-28 | 2013-05-15 | 北京航空航天大学 | Freezing fixation flexible clamp used for numerical control cutting machining of thin-walled part |
| CN106002360A (en) * | 2016-05-30 | 2016-10-12 | 成都飞机工业（集团）有限责任公司 | Thin-wall porous structure sheet material milling and clamping method and thin-wall porous structure sheet material clamping device |
| CN206653159U (en) * | 2017-02-24 | 2017-11-21 | 浙江万里扬股份有限公司 | Fixture and processing assembly |
| CN108788847A (en) * | 2018-06-26 | 2018-11-13 | 上海理工大学 | A kind of magnetorheological fixture of processing thin-wall curved-surface workpiece |
| CN110125707A (en) * | 2019-05-14 | 2019-08-16 | 上海理工大学 | Magnetorheological grip device for the processing of thin-walled concave curved surface part |
| CN211277966U (en) * | 2019-11-01 | 2020-08-18 | 徐州鑫环密封科技有限公司 | non-Newtonian fluid phase change clamp applied to grinding |
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| CN110744447A (en) | 2020-02-04 |
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